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Bound magnetic polaron in magnetic semiconductors
Author(s) -
Kuivalainen P.,
Sinkkonen J.,
Kaski K.,
Stubb T.
Publication year - 1979
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220940119
Subject(s) - polaron , condensed matter physics , magnetic field , magnetic impurity , degenerate energy levels , electron , ferromagnetism , bound state , binding energy , physics , impurity , magnetic energy , electrical resistivity and conductivity , atomic physics , quantum mechanics , magnetization
The bound magnetic polaron (BMP) model is studied for a ferromagnetic non‐degenerate semiconductor. Using Zubarev's Green's function technique a set of coupled equations for the nonuniform spin polarization around an impurity is obtained and the binding energy of a shallow impurity state. A variational solution of these equations indicates that near the magnetic transition temperature the binding energy increases and the orbit of the bound electron shrinks. The application of a magnetic field decreases the binding energy and increases the electron orbit. The calculated temperature and magnetic field dependences of the resistivity are compared with the measured values for a EuSe sample.